Porifera

Question 1

Acoelomate

Answer 1

composed of cells, no tissues

Question 2

Habitat

Answer 2

primarily ocean and some in fresh water

Question 3

sessile

Answer 3

move slowly

Question 4

ascon

Answer 4

water goes in through choanocytes through ostia (pore from the outside), osculum is the opening of the choanocytes. Spongeocoel is at the bottom. Ostia allows food to go in and block out large food. Non-feeding part is bigger than feeding part.

Question 5

sycon

Answer 5

inside folded up (which contains a larger surface area without increasing outside surface area). Water pumps through ostia and leaves through osculum

Question 6

leucon

Answer 6

it’s circular and contain ostia inside and osculum on the outside surface area. Contains choanocytes connected by the connecting tubes

Question 7

pinacocytes

Answer 7

cells on the outside(skin)

Question 8

porocyte

Answer 8

pipe like cell goes from outside to inside

Question 9

choanocytes

Answer 9

The spongocoel is lined with flagellated cells called choanocytes. By beating flagella, the choanocytes create a current that draws water in through the pores and out through the osculum.

Question 10

Mesohyl

Answer 10

middle, non cellular layer

Question 11

amebocytes

Answer 11

these cells can transport nutrients to other cells of the sponge body, produce materials for skeletal fibers (spicules) or become any type of sponge cell as needed.

Question 12

how do they eat?

Answer 12

filter feeder

Question 13

predators and defense

Answer 13

eaten by sea stars and sea slugs

use spicules as defense (sharp pointy and poisonous)

Question 14

digestion

Answer 14

intracellular

Question 15

excretion

Answer 15

diffusion

Question 16

respiration

Answer 16

oxygen from water and through the cell

Question 17

circulation

Answer 17

diffuse through choanocytes to mesohyl

Question 18

nervous system

Answer 18

none uses chemical signals instead